Operative definiton of "symbol" according to:
http://www.dictionary.com/symbols

The symbol in Beloved can be also seen as a motif seen thoroughout the text as a recurret abstract idea or concepts. The most prominent symbols seen throughout Beloved are colors, trees, water and Beloved:

Colors:
Colors are seen emphasized throughout the text from Baby Sugg's death bed to Paul D's "red heart". Throughout the color symbol present within the novel, the colors from the red spectrum which includes orange and pink appears to be the most emphasized colors throughout the text. The colors present throughout Beloved is indicative of polar ends of emotions, as the red in Paul D's description of his "red heart"is on the opposite spectrum of images asssociated with death and/or loss in the case of the symbol of red roses. The carmine velvet that the reader encounters with Amy Denver is also seen as a futile dream of the protagonist in creating a haven intact of her past at Bluestone Road 124.

Water:
This symbol is perhaps the most significant symbols seen throughout the text. This is symbolic of fertility and on the other hand, destruction. This symbol is also associated with both the cycle of nature and Sethe's past and present. Specific instances where we see this cycle is when Sethe gives birth to Denver in the Ohio river. Here the symbol of water encompasses fertility, destruction and cycle. The symbol for cycle is evident in this scene as the Sethe's amiotic fluid converge with the Ohio River, and this cycle is completed with Sethe's tears, metaphoric of the sea that the rivers are connected to. This cycle is ultimately met with death, as everything is at the end of all cycles.

Trees:
The symbol of trees are perhaps the most apparent of the symbols throughout the text. The reader first encouters this symbol with the Chokeberry tree on Sethe's back. This is symbolic of the history of Sethe's past and more importantly on the historical context, the history of African Americans during the era of slavery. Morrison, through this symbol successfully incorporates the painful history of African Americans in this novel, and conveys to the reader the hardships that these slaves were made to endure. Although the tree on Sethe's back has one of the most important of symbolic significance in the novel, there are others, such as the "emrald closet" of Denver's. This is symbolic of haven, in the manner that 124 is a haven to Sethe from her haunting past.

Beloved:
Beloved, Sethe's third-born daughter and her antagonist is the symbol for Sethe's haunting past memories. This specifically relates to the instance when she killed her infant daughter Beloved, although this also relates to the her greater suffering of past memories of slavery.